ZOBODAT - www.zobodat.at Zoologisch-Botanische Datenbank/Zoological-Botanical Database Digitale Literatur/Digital Literature Zeitschrift/Journal: facetta - Berichte der Entomologischen Gesellschaft Ingolstadt e.V. Jahr/Year: 1998 Band/Volume: 16 Autor(en)/Author(s): Bartolozzi Luca, Sforzi Alessandra Artikel/Article: Description of Odontolabis kirchneri new species of stag beetle from Sumatra (Coleóptera, Lucanidae) 2-6 Description of Odontolabis kirchneri new species of stag beetle from Sumatra (Coleóptera, Lucanidae) Luca Bartolozzi & Alessandra Sforzi Museo Zoologico “La Specola”, Sezione del Museo di Storia Naturale dell’Uni ver- sita degli Studi di Firenze - via Romana 17 -1-50125 Firenze - Italy Abstract A new species of stag beetle from Sumatra (Indonesia),Odontolabis kirchneri n. sp., is described and compared to the closely related speciesO. castelnaudi Parry , 1862. Introduction Thanks due to the kindness of Mr. Andreas Kirchner (Reichertshofen, Germany) and Mr. Karl Werner (Peiting, Germany) we were able to study a small collection of Lu­ canidae recently collected in the Island of Sumatra (Indonesia). Among the speci­ mens a new species was present, whose description is given below. Description Male (Fig. 1). Body large, elongated, moderately convex; mandibles, head, pronotum and legs dull black; elytra light chestnut brown, with base, lateral border and sutural stripe black; in some specimens the sides are also black and the basal and sutural dark stripes are much larger. Head transverse, flat; surface finely and densely granulose; frons almost straight with an elevated convex carina in large specimens; anterior angle obtuse; canthi par­ allel-sided totally dividing eyes. Postocular process triangular, strong, more or less rounded apically, directed downwards. Mandibles very variable in shape and size. In prionodont specimens (Fig. 2) they are shorter than head, large, flat, rounded exter­ nally, irregularly serrate at the inner margin. In mesodont specimens (Fig. 1) the mandibles are larger than head, less rounded externally, slenderer with a very strong basal tooth on the inner margin, followed by a few small denticules, by a very strong double anteapical tooth and then by one or two small teeth before the apex, which is sharp and pointed. In telodont specimens (Figs 3 and 4) the mandibles are much lar­ ger than head, slender, almost straight externally; the basal tooth, if present, is very small, but it totally disappears in very large specimens. The anteapical tooth is well developed, slender, flat, bicuspidated, directed inwards and forward. The apex is sharp and pointed. Some small teeth are sometimes present before the anteapical one, but in very large specimens they totally disappear, and the only tooth which is present on the inner side is the large anteapical one. Antennae normally shaped as in the other species of the genus. Prothorax transverse, shorter than head, surface finely and densely granulose, ante­ rior margin bisinuated, lateral margins regularly rounded for 3/4, then strongly con­ cave backwards to the base, which is bisinuated; a row of short golden pubescence is present at the anterior margin and at base. Scutellum small, shiny. Elytra oval, longer than head and prothorax together, smooth and shiny; base straight, sides regularly rounded. Legs long and slender, protibiae longer than profemora, slightly curved inwards, un­ armed externally, sometimes with a very small denticule on the distal third of the ex­ ternal margin; meso- and metatibiae unarmed. Mentum slightly bilobed, covered with dense short reddish pubescence. Underside of the head laterally covered with strong punctuation. Prosternal apophysis triangu­ lar. Abdominal segments smooth and opaque. Female Body oval, convex; mandibles, head, pronotum and legs dull black; elytra light chestnut brown, with base, lateral border and sutural stripe black; in some specimens the elytra are almost black in colour, with brownish tints on the disc. Head (Fig. 5) transverse, straight in front with clypeus slightly bilobed. Canthi stron­ gly rounded, temples almost lacking, base straight, vertex convex with two lateral depressions near the eye borders. Surface strongly punctuated. Mandibles shorter than head, strongly rounded externally, sharply pointed at apex, inner margin irre­ gularly toothed in the distal half. Prothorax transverse, longer than head, surface with very small scattered punctures, more dense laterally and on the margins; anterior margin straight; sides regularly ro­ unded for -V4 of their length, then strongly concave towards the base, which is almost straight; a row of short golden pubescence is present at the anterior margin and base. Scutellum small, shiny. Elytra oval, longer than head and prothorax together, smooth and shiny; base straight, sides regularly rounded. Protibiae slightly longer than profemora, enlarged distally, with five irregular teeth externally; meso- and metatibiae unarmed. Mentum semicircular, strongly punctured, slightly elevated laterally. Underside of the head laterally covered with strong punctuation. Prosternal apophysis rounded, short. Abdominal segments smooth and opaque. Dimensions (in mm) Holotype. Total length: 61.8; mandible length: 13.3; maximum width at elytra: 22.2. Allotype. Total length: 35.5; mandible length: 3.2; maximum width at elytra: 15.6. Male paratypes. Total length: 48.6-67.0; mandible length: 8.6-19.0; maximum width at elytra: 19.2-23.6. Female paratypes. Total length: 32.1-37.8; mandible length: 2.9-3.2; maximum width at elytra: 15.2-15.6. Material Holotype: 1 male, Indonesia, W-Sumatra, Gunung Talang, I-II.1998, local collec­ tors; allotype: 1 female, same data; paratypes: 9 males, 6 females, same data. Holo­ type (coll, number 10633), allotype (10634) and 1 female paratype (10635) in the Zoological Museum „La Specola“ of the University of Florence; the other paratypes in the private collections of Mr. Andreas Kirchner and Mr. Karl Werner. Derivatio nominis This new species is dedicated to Mr. Andreas Kirchner, Reichertshofen (Germany), owner of one of the biggest Lucanidae collection of the world. Remarks This species is closely related toOdontolabis castelnaudi P a r r y , 1862. The body colour is the same, butO. castelnaudi is a more massive and large species. In this ta­ xon the male body length varies from 52 to 79 mm, followingL a c r o ix (1984), with an average length of 65.5 mm; or from 53.7 to 84.4 mm, followingN a g a i (1986), with an average of 69.0 mm, or from 52 to 94 mm, followingM iz u n u m a & N a g a i (1994), with an average of 73 mm. In O. kirchneri n. sp. the male body length goes from 52 to 67 mm, with an average length of 59.5 mm and thus this species is com­ paratively much smaller than the preceding one. One of the main morphological differences betweenO. castelnaudi and O. kirchne­ ri n. sp. is the shape of the male mandibles, mainly in the telodont forms.O. kirch­In neri n. sp. the mandibles are more straight externally, with a reduction of the inner small teeth; in a large specimen of the typical series all the small inner teeth are lacking, even the basal one, and this does not happenO. incastelnaudi telodont ma­ les (Fig. 6). Another difference is the shape of the post ocular process, which is small, rather sharp and directed downwards inO. kirchneri n. sp., whilst it is larger, rounded and less directed downwards inO. castelnaudi. The protibiae are similar in shape in both species, but in most of the specimens of the typical seriesO. kirch­of neri n. sp. the external denticule is very reduced or missing, whilst it is present in all the specimens ofO. castelnaudi we have examined. The females mainly differ in ha­ ving the lateral apical dilatation of the protibiae more developedO. in kirchneri n. sp. than inO. castelnaudi, and the lateral elevations of the mentum less developed. Recently two subspecies ofO. castelnaudi have been described: O. castelnaudi in- omatai M iz u n u m a , 1994 from Simeulue Island, andO. castelnaudi mentawaiensis M iz u n u m a , 1994 from the Mantawai Ar­ chipelago, but O. kirchneri n. sp. does not show the characters of these two taxa. Aknowledgements We are grateful to Mr. Karl Werner for giving us the opportunity of describing this new species; to Mr. Andreas Kirch­ ner for the loan of the material and for the donation of holo- and allotype to the Zoo­ logical Museum of the University of Flo­ rence; to Ms. Rossella Poggesi (Florence) for the drawings of this paper. Fig. I. Habitus ofOdontolabis kirchneri n. sp., male (holotype) Fig. 2: Odontolabis kirchneri n. sp., male, prionodont form Figs 3,4:Odontolabis kirchneri n. sp., male, telodont forms Fig. 5:Odontolabis kirchneri n. sp., female Fig. 6:Odontolabis castelnaudi, male, telodont form References L a c r o ix J. P., 1984. Odontolabini. Chalcodes,1: Odontolabis, Heterochtes. In: Les Coléoptères du Monde, Ed. Sciences Nat, Venette: 1-175, 70 figs, 49 pis. M iz u n u m a T. & N a g a i S., 1994. The Lucanid beetles of the world. Mushi-sha Ico­ nographie series of Insects. H. Fujita (Ed.), Tokyo, 1: 1-338, 115 figs, 156 pis. N a g a i S., 1986. A Revisional Synopis of the genusOdontolabis Hope (Coleóptera, Lucanidae) from the North Borneo, with description of a new species. Gekkan- Mushi, 182: 4-14, 12 figs. Insektenbörse in Ingolstadt Die 26. Ingolstädter Insektenbörse findet am 17. Januar 1999 von 9.00 bis 16.00 LThr in der Leo-v.-Klenze-Schule, am Brückenkopf (alte Donaubrücke) in Ingolstadt statt..